工学 安全设施 释 fire wall 防火墙 具有在一定时间内（一般4个小时）不会被烧或具有4小时以上的耐火极限的燃烧材料砌筑在独立基础或钢筋混凝土框架上，用以形成水平防火分区，控制火灾蔓延的重要分隔物。 工学 防火分区 释 fire wall 防火墙 防止火灾蔓延至相邻建筑或相邻水平防火分区，且耐火极限不低于3小时的不燃性墙体。
网络与数据通信 网络管理与安全 释文 firewall 防火墙
- diffraction-free beam
- diffraction fringe
- diffraction generator
- diffraction grating
- diffraction grating alignment measure
- diffraction group
- diffraction halo
- diffraction image
- diffraction intensity
- diffraction limit
- diffraction-limited beam
- diffraction-limited imaging
- diffraction-limited lens
- diffraction limited system
- diffraction-limited system
- diffraction loss
- diffraction measurement
- diffraction method for polycrystal
- diffraction methods
- diffraction microscope
- diffraction of acoustic wave
- diffraction of light
- diffraction of sound
- diffraction of X-ray
- diffraction of Xray